var ann = document.getElementById('sut')
        var sut = document.getElementById('support')
        var flag = 0
        ann.onclick = function () {
            if (flag == 0) {
                sut.style.display = 'block'
                flag = 1
                ann.style.color = '#fff'
            } else {
                sut.style.display = 'none'
                flag = 0
                ann.style.color = 'rgb(152, 152, 152)'
            }
        }